BSI - BS 2738
Specification for tolerances on optical properties of mounted spectacle lenses
inactive, Most Current
| Organization: | BSI |
| Publication Date: | 31 January 1985 |
| Status: | inactive |
| ICS Code (Ophthalmic equipment): | 11.040.70 |
scope:
Specifies tolerance requirements for lens power, cylinder axes, base setting and power of prisms, and centration for spectacle lenses ready for wear. Includes tolerances for progressive power lenses. Recommendations for characteristics, related to tolerances which cannot be specified, are given in an appendix.
Document History
BS 2738
January 31, 1985
Specification for tolerances on optical properties of mounted spectacle lenses
Specifies tolerance requirements for lens power, cylinder axes, base setting and power of prisms, and centration for spectacle lenses ready for wear. Includes tolerances for progressive power lenses....
June 12, 1962
Specification for spectacle lenses
Definition of lens power. Tolerances on power of lenses, cylinder axes, optical centration of finished lenses, base-apex direction, plano-prisms. Finish, glazing, marking. Test methods not included.